NASA announces unprecedented return of sick ISS astronaut and crew

Per launch? I think the "everyone died" rate is about, what, 1.2% of crewed launches?

Whatever it is, I am aware that my lack of concern here is something which makes me different from normal people. I don't really get why people in general are ashamed of their medical histories, but I nevertheless absolutely do support everyone's right to keep such secrets, because there's a few specific cases where the medical history reveals something socially damaging either in the present or with a risk of it becoming so in the future, the obvious example of which is an abortion given the US seems to be facing a loss of freedom in this regard.

(Perhaps most people have something socially damaging in their medical histories, and I've just not noticed because nobody says the thing?)

Also coming down on the Soyuz is pretty routine and only takes a few hours- I’d say it was overall a far less risky situation than being in Antarctic on a deep ocean vessel with appendicitis etc

We have dozens and (hundreds behind them) of men and women monitoring those folks from a global network of control centers 24 hrs a day- The station is mostly commanded from the ground and plans and procedures exist for everything

- if anything its all over orchestrated and over-planned in my opinion, owing to national politics, corporate contracts and international bureaucracy

Is it risky- yes obviously-but I’d argue its less risky then being out at the south pole in winter

See: https://nasawatch.com/iss-news/crew-medical-telecon-summary/

The operating depth of most submarines is ~300 -- 500m (980 -- 1640 ft), roughly one-third to one-half the depth you cite.

The two USN nuclear submarines lost due to pressure-hull failures, the Thresher (1963) and Scorpion (1968) both failed at depths of 1,200 to 2,000 ft. Threser's test depth was 1,300 ft (400m), and she was operating at about this depth when communications were lost. Scorpion likely failed at 1,530 ft. (470m).

https://en.wikipedia.org/wiki/USS_Thresher_(SSN-593)#Cause>

https://en.wikipedia.org/wiki/USS_Scorpion_(SSN-589)#Disappe...>

There are other submersible vessels in the US Navy which can and have operated at greater depths, notably the submersible Alvin and bathyscaphe Trieste II, but those are not combat vessels. Alvin's test deopth is 6,500m (21,300 ft). Triest II's predecessor, Trieste, reached the floor of the Challenger Deep in the Marianas Trench, deepest known spot in the oceans, at 10,916m (35,814 ft). Trieste II incorporated the pressure sphere from its predecessor.

A more conventional, but still experimental, submarine, the USS Dophine (AGSS-555) was a deisel-electric research submarine which reached a depth in excess of 3,000 ft (910 m), probably in 1969. The boat was in-service through 2006.